package com.crean.demo.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.crean.demo.entity.User;

/**
 * user mapper
 *
 * @author lfr
 */
public interface UserMapper extends BaseMapper<User> {

    /**
     *
     *  不同名称的数量
     *
     * @return Integer 用户数量
     */
    Integer selectCountGroupByName();
}
